ASVAB Electronics Information Practice Test 990310 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.73
Score	0%	75%

Review

The hertz is a unit of measurement for:

81% Answer Correctly

	frequency
	inductance
	energy
	power

Solution

The hertz is a unit of measurement for frequency.

An engineer who wants to document an electric circuit would create which of the following?

67% Answer Correctly

	a layout
	a matrix
	a blueprint
	a schematic

Solution

A schematic is the proper name for a drawing of an electric or electronic circuit.

Which of the following is the formula for calculating electrical power?

73% Answer Correctly

	P = I²V
	\(P = {I \over V}\)
	\(P = {V \over I}\)
	P = IV

Solution

Electrical power is measured in watts (W) and is calculated by multiplying the voltage (V) applied to a circuit by the resulting current (I) that flows in the circuit: P = IV. In addition to measuring production capacity, power also measures the rate of energy consumption and many loads are rated for their consumption capacity. For example, a 60W lightbulb utilizes 60W of energy to produce the equivalent of 60W of heat and light energy.

4 Use Ohm's Law to calculate the value of current in this circuit if voltage is 280 volts and resistance is 40 Ω.

80% Answer Correctly

	10 A
	7 A
	7.7 A
	21 A

Solution

Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.

Solved for current, I = \( \frac{V}{R} \) = \( \frac{280}{40} \) = 7 A

Alternating current changes __________ many times each second.

72% Answer Correctly

	resistance
	frequency
	period
	direction

Solution

In contrast to the constant one-way flow of direct current, alternating current changes direction many times each second. Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances.